3 years ago

What is the equation of the line

Mathematics

1 answer:

lawyer [7]3 years ago

5 0

y=2x+2

I just know the awnaanser and yup

good luck

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Consider the following hypothesis test: H 0: 20 H a: < 20 A sample of 60 provided a sample mean of 19.5. The population stand

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Answer:

We reject the null hypothesis and accept the alternate hypothesis. Thus, it be concluded that the population mean is less than 20.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 60

Sample mean, $\bar{x}$ = 19.5

Sample size, n = 60

Alpha, α = 0.05

Population standard deviation, σ = 1.8

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 20\\H_A: \mu < 20$

We use One-tailed z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{19.5 - 20}{\frac{1.8}{\sqrt{60}} } = -2.151$

Now, $z_{critical} \text{ at 0.05 level of significance } = -1.64$

Since,

$z_{stat} < z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis. Thus, it be concluded that the population mean is less than 20.

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John goes out to eat at a local restaurant. The bill comes to $47.83. John want to leave a 20% tip. How much of a tip should he

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$10.17 is the 20% tip amount

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3 years ago

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Solve the inequality –1 > –2(x – 4) – 5(4x – 7).

Ksivusya [100]

Answer:

$x > 2$

Step-by-step explanation:

$–1 > –2(x – 4) – 5(4x – 7)$

$–1 > –2x + 8 –20x + 35$

$–1 > - 22x + 43$

$- 1 - 43 > - 22x$

$- 44 > - 22x$

$\frac{ - 44}{ - 22} < \frac{ - 22x}{ - 22}$

$2 < x$

$x > 2$

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3 years ago

A population of paramecia, P, can be modeled using the exponential function P(t)=3(2)t , where T is the number of days since the

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Answer:

Step-by-step explanation:

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3 years ago

A plumber had a pipe that was 2 \text { yards}2 yards long. He cut 18 \text{ inches}18 inches off the end of the pipe. How many

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Answer:

4.5 feet of pipe after he cuts it

Step-by-step explanation:

You multiply 2 by 36 to get inches then subtract 18 which is 54 inches and then you divide by 12 to turn it into feet and you get 4.5

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